Air-pressure brake.



P. KORT.

AIR PRESSURE BRAKE.

APPLICATION FILED DEC. 12, 1913.

Patented May 9, 1916.

40 a Z W W J WiZWLe a/iwo @FFICE.

PAUL KURT, 0F HANOVER, GERMANY, ASSIGNOR TO THE FIRM 0F GEBRUDER KGB/TING AK'IIENGESELLSCI-IAFT, 0F LINDEN, NEAR HANOVER, GERMANY.

AIR-PRESSURE BRAKE.

Application filed December 12, 1913.

To all whom it may concern Be it known that I, PAUL Komycitizen in the German Empire. residing at Hanover, Germany, have invented certain new and useful Improvements in Air Pressure Brakes, of which the following is a specification.

This invention relates to improvements in air pressure brakes especially those used on railway trains and its object is to reduce the quantity of compressed air which must be supplied from the pump when Working.

Its object is further to cheapen the operation and'to increase the efficiency and quickness of action of the brake.

To meet these ends according to the present invention, the compressed air at the points where it is admitted to the apparatus,

which may be either at the drivers valve or at the triple valve, is caused to draw in through a suitable suction device fresh air to supplement the supply from the pump.

The invention is illustrated by way of example in the accompanying drawings in which Figure 1 shows the invention applied to the drivers valve in an air pressure brake system, this figure being a section on the line AB of Fig. 2. Fig. 2 is a section on the line C D of Fig. 1. Fig. 3 shows the invention applied to the triple valve located between the auxiliary reservoir and the brake cylinder, this figure being a section on the line EF of Fig. 4. Fig. 4: is a section on the line G H of Fig. 3.

In carrying the invention into elfect according to the form shown in Figs. 1 and 2, the chamber 72 of the drivers valve a is connected in the known manner to the main reservoir. When the valve 6 is opened by the driver or operator, compressed air passes from the chamber through the valve 6 and enters at 9 into a suction device which is here shown as a double conical nozzle. This suction device is surrounded by an annulus m in communication with the outer air. The compressed air passing through the suction device 0 draws air from this annulus which air passes from the drivers valve (4 to the main train pipe past the pressure regulating valve n. The compressed air passes through the pressure regulator it until the train pipe reaches the normal working pressure. The annulus m is Specification of Letters Patent.

Patented May 9, 1916.

Serial No. 806,320.

connected to the outer air through a passage in, chamber 2' and non-return valve h.

For the purpose of preventing entry of dirt the sieve 0 is inserted in the chamber 2'. By arranging the air suction device in the drivers valve as described this suction de vice can be properly controlled and Ol served by the operator when operating the drivers valve. The invention however may be applied at any point where the flow of air under pressure is initiated on operating the valves either to apply or put off the brakes.

According to the form shown in Figs. 3 and 4 the suction device 0 is inserted in the control valve located between the auxiliary reservoir and the brake cylinder of a pressure brake system. This control valve, usually called a triple valve 7), is as is well known interposed between the auxiliary or reservoir attached to each brake cylinder and the brake cylinder itself. The construction of the triple valve is not fully illustrated in the figures as this construction has no bearing on the present case.

The conduit or passages g r in the valve form part of the connection from the auxiliary reservoir to the brake cylinder. The suction device 0 according to the present invention is interposed in this path. As before, this suction device comprises a double nozzle passage. The outer air is drawn through the annulus m past the non-return valve h; and 0 as in Fig. 3. In the normal or non-working position of the valve the forward opening of the suction device is closed by means of the small valve .9 which is connected to and operates with the slide valve 25 which is controlled in the known manner by the piston 11. The connection between the slide t and valve .9 is effected in such a manner that the passage of the air to the air suction device remains unthrottled.

For the purpose of quick action it is nec essary to conduct the air pressure through as large passages as possible to the brake cylinder. The suction device with its narrow conduit is not sufficient for the rapid conduction of the air from the auxiliary pressure cylinder into the brake cylinder. In the triple valve sleeve there is therefore provided a passage 00 which in the quick acting position of the control piston '21 is opened by the slide 1- and thereby connects the auxvision of this by-pass it will be understood does not preclude a certain amount of air passing through the narrow opening of the suction device a. slide valve the by-pass w y Fig. 3, is connected to the outer air through the cavity 15 and port w so that a rapid exhaust of the air from the brake cylinder may be effected. This completely avoids any delay in the loosening of the brakes owing to retardation in the escape of the air owing to the narrow orifice in the suction device.

It is possible to use the suction device both in the drivers valve and in the local control or triple valve simultaneously without in any way departing from this invention. This is to say the valve according to Figs. 1 and 2 would be used as a drivers alve and the valve according to Figs. 3 and l would be used at the separate brake cylinders.

I claim:

1. In an air pressure brake system, a triple valve casing, a conduit in said valve casing and leading from the auxiliary reservoir to the brake cylinder, and an air suction device in said conduit.

2. In an air pressure brake system, a triple valve casing, a conduit in said casing, a control piston, a slide valve operated thereby, a by-pass conduit to said first mentioned conduit and controlled by said valve, a suction device also controlled by said valve and interposed'in said first mentioned conduit between the connections thereto and the bypass, substantially as described.

3. In an air brake system, the combination with a triple valve, of means operable upon a movement of the triple slide for introducing atmospheric air into the brake cylinder to supplement the supply from the auxiliary reservoir.

4. In an air brake system, the combina tion with a triple valve, of an automatic air suction device interposed between the slide valve chamber and the brake cylinder, a

, valve normally closed when the slide valve is in release position for controlling the admission of air to the suction device, means connecting the said valve with the triple slide valve, whereby upon a movement of the slide valve to service position. the suction valve will be opened. I

5. In an air brake system, the combination with a triple valve, of an air suction device interposed between the slide valve to operate during service position of the In the off position of the tion with a triple valve, of an air suction device interposed between the slide valve chamber and the brake cylinder, means operated by the movement of the slide valve for controlling the passage of air to the suction device, the triple valve casing having a passage, said passage communicating with the suction. device and the atmosphere, and automatic means for controlling the flow of air in the passage.

7 In an air brake system, the combination with a triple valve of an air suction device interposed between the slide valve chamber and the brake cylinder, means for controlling thepassage of air in the suction device, and means operating independently of the suction device for quickly venting and quicklycharging the brake cylinder.

8. In an air brake system, the combination with a triple valve of an air suction device interposed between the slide valve chamber and the brake cylinder, a valve controlling the passage of air through the suction device, and means for opening an auxiliary passage between the brake cylinder and the atmosphere independent of the suction device for quickly venting the brake cylinder during release position.

9. In an air brake system, the combination with a triple valve, of .an air suction device interposed between the slide valvechamber and the brake cylinder, a valve in the suction device operated by the move -ment of the slide valve and normally closed when the slide valve is in release position,

phere, the slide valve having a cavity which 1 is adapted to connect the two aforesaid ports when the slide valve is in release position whereby the brake cylinder will be quickly exhausted.

10. In an air brake system, the combination with a triple valve, of an air suction device interposed between the slide valve chamber and the brake cylinder, a valve controlling the admission of auxiliary reservoir a1r mto the dev1ce,'and means 0p-:

erated by the movement of the triple valve piston for opening an auxiliary passage between the slide valve chamber and the brake cylinder when said triple piston is in its emergency position for quickly charging the brake cylinder independent of the suction device. chamber and the brake cylinderand adapted 11. In an air brake system, the combination with a triple valve, of an air suction 1130 device interposed between the slide valve chamber and the brake cylinder, a valve controlling the passage of air to the device, a passage independent of the suction device leading from the brake cylinder to a port in the slide valve seat, whereby upon a movement of the slide valve to emergency position the port will be opened and the brake cylinder quickly charged.

12. In an air brake system, the combination with a triple valve, of an air suction device interposed between the slide valve chamber and the brake cylinder and comprising a tubular member having a longitudinal reduced passage therein, said passage Copies of this patent may be obtained for five cents each, by addressing opening in a relatively Wider longitudinal passage in the tubular member, said member having a plurality of transverse openings in its sides, said openings communicating with the wider passage and located adjacent the end of the reduced passage, said transverse openings also communicating with an annular cavity in the triple valve casing, said cavity communicating With the atmosphere and a check valve controlling said communication.

PAUL KORT.

\Vitnesses TOH. EHERDING, EMMI MEIER.

the Commissioner of Patents,

Washington, D. 0." 

